Lincoln Knowles free soloed the tallest bolted big wall in North America, and he's nowhere close to being done.
4hon MSN
Daredevil mountaineer makes history skiing down Mount Everest through death zone without oxygen
Andrzej Bargiel, 37, completes the first oxygen-free ski descent of Mount Everest after spending 16 hours in the dangerous death zone above 8,000 meters.
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